If you have a driver's license, you may have heard that question before..."Do you know how fast you were going?" When asked by a state trooper wearing shiny, reflective sunglasses, the question can be pretty intimidating.
Would you be intimidated if the question came from your group exercise instructor or personal trainer?
What if you asked that question of yourself? Maybe not "how fast were you going," but "how hard are you working?" It doesn't haven't be a scary question -- in fact, it can be an essential way to evaluate your workout.
One way to tell how hard you are working is to measure your heart rate. You could do that manually by counting your pulse for six seconds, then multiplying by 10, however that's kind of a pain to do DURING your workout.
You can use a heart rate monitor for any dry-land exercise -- PiYo, Insanity Max 30, even chasing your dog at the park. Check out this Shape Magazine article for more information about heart rate monitors, how to find your target heart rate, and how this tool can change your fitness!